How to start my bosch 1677 worm drive saw?

I am hoping somebody can help me out here. I bought a refurbished Bosch 1677 Worm Drive saw from CPOBosch and the Big Foot 10" Saw Adaptor. The adaption went well, however, halfway through my first cut on a 4 x 4, it died. My first thought was that I blew a breaker. Unfortunately that was not the case. It just doesn't work anymore. Is there an internal fuse or something that can be replaced or reset? I don't know if CPOBosch will take it back since to install the Big Foot, it is neccessary to cut off the boss screw housing. I am extremely disappointed I have $450 saw that doesn't work. Please help.